Two-way messaging system in social network for elderly

U ovom radu opisane su tehnologije i postupci kojima je ostvaren dvosmjerni sustav poruka u socijalnoj mreži za starije osobe. Uvod opisuje cijelokupnu socijalnu mrežu dobivenu integriranjem projekata svakog diplomskog tima u jedan zajednički projekt. Nakon toga su navedene i opisane tehnologije koje su se koristile prilikom izrade web aplikacije; HTML 5, JavaScript/JQuery, CSS/Bootstrap, Java JSON API i WebSocket protokol. Detaljnije je opisan WebSocket protokol, kao glavna tehnologija na kojoj se zasniva izvedba dvosmjerne komunikacije u sustavu, točnije njegova faza rukovanja i faza slanja podataka. Konačno, slijedi opis izvedbe web aplikacije pri čemu se posebno opisuju klijentska i poslužiteljska strana. Rad završava Rezultatima i Zaključkom gdje je dan osvrt na aplikaciju i glavne prednosti korištenih tehnologija.The goal of this paper was to describe technologies and procedures that led to the development of the two-way messaging system in socail network for eldery. Introduction describes complete social network for elderly which was created by merging projects from each graduate team into one joint project. Second chapter examines technologies that were used during development of the web application; HTML 5, JavaScript/JQuery, CSS/Bootstrap, Java JSON API and WebSocket protocol. WebSocket protocol is described in detail by two subchapters, since it's the most important technology of this paper, and base of the two-way messaging system. First subchapter illustrates handshake phase of the protocol, and second subchapter looks at data transfer phase. Next is description of the web application, separately examining client and server side. Finally, Results and Conclusion give overview of the web application and virtues of technologies that are used